Journal
MATERIALS SCIENCE AND TECHNOLOGY
Volume 38, Issue 11, Pages 753-759Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/02670836.2022.2063526
Keywords
Silica thin films; e-beam evaporation; hydrophilicity; solvent treatment; hydrophobicity; wetting behaviour; contact angle measurement
Funding
- Qatar National Library
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In this study, controlled changes in the wetting behavior of silica thin films were achieved by treating coated surfaces with acetone solvent, resulting in a shift from superhydrophilic to hydrophilic. X-ray photoelectron spectroscopy analysis indicated different stoichiometries for treated and untreated samples, paving the way for cost-effective and efficient anti-soiling and self-cleaning coatings.
In this work, we report on the controlled change of the wetting behaviour of silica thin films deposited by a reactive e-beam evaporation. The as-deposited coated surfaces were treated with acetone solvent using an ultra-sonic bath followed by characterising their contact angles. As confirmed by a repeated contact angle measurement, the silica thin films changed their wetting behaviour from superhydrophilic to hydrophilic which we attributed to the creation of OH groups and hydroxylation process. X-ray photoelectron spectroscopy analysis suggested a SiOx stoichiometry of SiO1.85 for the non-treated samples and SiO1.91 for the solvent-treated ones. Such promising results pave the way to develop a cost-effective and efficient anti-soiling and self-cleaning coating for a large-scale application.
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